四苯基卟吩及取代四苯基卟啉-铁配合物的紫外可见光谱研究  

UV-VIS SPECTRA OF MS-TETRAPHENYLPORPHIN AND PARA-SUBSTITUTED TETRAPHENYLPORPHYRIN COMPLEXES OF GHLORO-IRON(Ⅲ)

作　　者：朱志昂[1] 张智慧[1] 江冬青[1] 唐铁军 陈荣悌[1] 

机构地区：[1]南开大学化学系,天津300071

出　　处：《光谱学与光谱分析》1990年第1期15-20,23,共7页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金

摘　　要：测量了四苯基卟啉(TPP)、四苯基卟啉铁(FeTPPCl)、对甲基取代四苯基卟啉铁(FeT(p-CH_3)PPCl)、对苯取代四苯基卟啉铁(FeT(p-Cl)PPCl)在苯、甲苯、苯氯、溴苯、四氯化碳、二氯甲烷、乙酸乙酯、1,2-二氯乙烷等溶剂中的紫外可见吸收光谱,并用微机联机处理求得了各收带的振子强度f值。研究了取代基效应及溶剂效应。结果表明,电荷转移(CT)带波长顺序为_(FeT(p-CH_2)PPCl)>λ_(FeTPPCl)>λ_(FeT(p-Cl)PPCl);随溶剂极性增加,TPP吸收带发生蓝移,FeTPPCl和FeT(P-Cl)PPCl的Soret带发生蓝移,而α,β,CT带发生红移;v～f(n^2)[或fε)]、ε～f(n^2)[或f(ε)]、f～f(n^2)[或f(ε)]、ε_B/ε_α～v_β之间均存在线性关系。The UV-VIS spectra of TPP, FeTPPCl, FeT(p-CH_3)PPCl, FeT(p-Cl) PPCl have been determined in benzene, methylbenzene, chlorobenzene, bromobenzene, carbon tetrachloride, dichloromethane, ethyl acetate, 1, 2-dichloroethane by means of Beckman DU-8B specctrophotometer. IBM-PC microcomputer has been employed in connection with spectrophotometer in order to obtain the oscillator strength of various absorptionbands, The results showed that (1) the charge transfer band followed the order: λ_(FeT(p—CH_3)PPCl)>λ_(FeTPPCl)>λ_(FeT(p—Cl)PPCl); (2) with increasing polarity of the Solvents, the blue shift of absorption bands for TPP and of soret band for FeTPPCl and FeT(p-Cl)PPCl was observed, but α, β bands and CT band for FeTPPCl and FeT(p-Cl)PPCl showed bathochromic shift; (3) linear relationships exist between the following pairs: absorption frequency v and the solvent parameters f(n^2)[orf(ε)]; molar extinction coefficient ε and f(n^2)[or f(ε)]; oscillator strength f and f(n^2)[or f(ε)]; ε_B/ε_α and γ_B.

关 键 词：紫外 可见光谱 四苯基卟吩 

分 类 号：O657.32[理学—分析化学]